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United States Patent | 5,173,825 |
Suzuki ,   et al. | December 22, 1992 |
A magnetic head has a magnetic core comprising a first half core on which a thin magnetic metal film is deposited and a second half core which is opposed to the first half core across a magnetic gap. The film thickness of the thin magnetic metal film of the first half core continuously varies at about a constant rate within a portion thereof adjacent to the effective portion of the magnetic gap.
Inventors: | Suzuki; Takashi (Kanagawa, JP); Sawada; Takeshi (Kanagawa, JP); Yamanaka; Toshio (Kanagawa, JP); Orikasa; Tsuyoshi (Saitama, JP); Suzuki; Hiroyuki (Kanagawa, JP); Kameyama; Makoto (Chiba, JP); Niizuma; Kiyozumi (Saitama, JP) |
Assignee: | Canon Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 108809 |
Filed: | October 14, 1987 |
Oct 15, 1986[JP] | 61-246044 | |
May 13, 1987[JP] | 62-117445 | |
May 14, 1987[JP] | 62-117602 | |
May 15, 1987[JP] | 62-119304 |
Current U.S. Class: | 360/126; 360/119; 360/122 |
Intern'l Class: | G11B 005/147; G11B 005/23 |
Field of Search: | 360/126,119,122,125 29/603 |
4636901 | Jan., 1987 | Ohura et al. | 360/125. |
4796133 | Jan., 1989 | Kuriyama | 360/119. |
Foreign Patent Documents | |||
0222006 | Feb., 1986 | JP | 360/125. |
0074109 | Apr., 1986 | JP | 360/125. |
TABLE 1 __________________________________________________________________________ D 25 .mu.m .THETA. 45.degree. 60.degree. W 0 .mu.m 10 .mu.m 20 .mu.m 0 .mu.m 10 .mu.m 20 .mu.m T 17.7 .mu.m 24.8 .mu.m 31.8 .mu.m 21.7 .mu.m 26.7 .mu.m 31,7 .mu.m __________________________________________________________________________